<template>
  <div>
    <!--  面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!--    添加角色按钮区&#45;&#45;为了方便放在列里-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!--    角色列表-->
      <el-table :data="rolelist" border stripe>
        <!--        最前面的展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!--            如果是标签的索引 i1 等于0的话第一个上面加边框，否则不加-->
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
                    :key="item1.id">
              <!--              一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--              二级权限-->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="danger" v-for="(item3, i3) in item2.children" :key="item3.id" closable
                            @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--     首列添加索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="warning" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="danger" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配角色
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!--      树形控件-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" :default-expand-all="true"
               :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {

      rolelist: [],    // 使用角色列表数据
      setRightDialogVisible: false,  //权限按钮-对话框
      rightslist: [],    //所有权限数据
      // 树形控件
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的控件节点
      defKeys: [],
      roleId: [],  //即将分配角色的id
    }
  },
  created() {
    // 获取所有列表的数据
    this.getRolesList()
  },
  methods: {
    // 获取所有列表的数据
    async getRolesList() {
      const {data: res} = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
      this.$message.success('获取权限列表成功！')
    },
    // 根据id删除三级标签
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      console.log('确认了删除')
      const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败！')
      }
      // this.getRolesList()  //全页面重新渲染--自动折叠
      role.children = res.data
    },
    // 点击权限按钮的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const {data: res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.err('获取权限数据失败！')
      }


      this.rightslist = res.data
      this.$message.success('获取权限数据成功！')

      //  递归获取三级节点
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
      console.log(this.rightslist)
    },
    // 通过递归的方式获取校色下的所有三级权限id，保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      // 不是三级节点 递归调用
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配角色对话框的关闭事件---为了关闭的时候id数组清空，避免数据累加污染
    setRightDialogClosed() {
      this.defKeys = []    //清空数组
    },
    // 树形控件确定按钮
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      await this.getRolesList()
      this.setRightDialogVisible = false

    }
  },
}
</script>

<style scoped lang="less">
.el-tag {
  margin: 10px;
}

.bdtop {
  border-top: 1px solid #e7e4e4;
}

.bdbottom {
  border-bottom: 1px solid #e7e4e4;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
